<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
<head>
   <link rel="stylesheet" href="css.css" type="text/css" />
</head>
<body>
<h1>hello</h1>
</body>
</html>